While a cup of cantaloupe with only 54 calories provides more than half of your daily vitamin C requirement, a third of your vitamin A, and a healthy dose of potassium, it is your watermelon that helps reduce heart disease and certain cancer risks.

The watermelon's red flesh contains lycopene, an antioxidant that helps reduce the risk of cardiovascular disease. A cup is only 40 calories and eating it at room temperature supplies nearly a quarter of the 30 milligrams of daily lycopene suggested by current research.